I own older cars and drive them into the ground, so I am new to this Dynamic Radar Cruise Control thing found in today's Toyotas. Rented a Camry with it recently and it was completely frustrating and useless in normal busy highway driving. What am I missing here? For example, on a busy limited access road with frequent interchanges the system would jam on the brakes every time someone was merging from the right. If I had maintained speed I would have been able to pass ahead of the other car which could have merged behind me. Or, I found that someone would blow by me, pull in ahead and the car would jam on the brakes again to maintain a ridiculously long following distance. This meant I kept gradually slowing up as more and more people jumped into the huge space in front of me. I also get all sorts of beeping warning sounds when doing normal things like driving around an exit or entrance ramp. I couldn't figure out what it was warning me about. I deliberately tried a few of these going way too slow, driving right down the middle and I still got beeping. What is it telling me? In general, I found the system useless, and possibly dangerous as it jams on the brakes in situations I would not expect it to.